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You can obtain a confidence interval for the o dds ratio [:FAQ/oddsr:using some simple calculations] or by clicking on risk under statistics in the crosstabs procedure in SPSS. You can obtain a confidence interval for the odds ratio [:FAQ/oddsr:using some simple calculations] or by clicking on risk under statistics in the crosstabs procedure in SPSS.

Odds Ratios are useful in summarising the effect size or magnitude of a difference in a 2x 2 table.

For example

Group

Sober

Drunk

Complied

106

9

Refused

59

56

Odds Ratio = (106/9) / (59/56) = (106x56) / (9x59) = 11.18

The compliers were 11 times more likely to be sober than the refusers.

You can obtain a confidence interval for the odds ratio [:FAQ/oddsr:using some simple calculations] or by clicking on risk under statistics in the crosstabs procedure in SPSS.

None: FAQ/OddsRa (last edited 2013-03-08 10:17:58 by localhost)